Surface tension of liquid Fe-Cr-O alloys at 1823 K

Joonho Lee, Koji Yamamoto, Kazuki Morita

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The surface tension of liquid Fe-Cr-O alloys has been determined by using the sessile drop method at 1823 K. It was found that the surface tension of liquid Fe-Cr-O alloy markedly decreases with oxygen content at constant chromium content, and the surface tension at a given oxygen content remains almost constant, regardless of the chromium content. When the surface tension of liquid Fe-Cr-O alloys is plotted as a function of oxygen activity, with an increase in the chromium content, the surface tension shows a much steeper decrease with respect to oxygen activity. The surface tension of liquid Fe-Cr-O alloys at 1823 K is given as follows: σ = 1842 - 279 In (1 + K OUO). Here, assuming a Langmuir-type adsorption isotherm, the adsorption coefficient of oxygen, KO(Fe-Cr), as a function of chromium content, was shown to be KO = 140 + 4.2 × [wt pet Cr] + 1.14 × [wt pet Cr]2.

Original languageEnglish
Pages (from-to)241-246
Number of pages6
JournalMetallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume36
Issue number2
DOIs
Publication statusPublished - 2005 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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